1 files changed, 155 insertions, 0 deletions
diff --git a/kernel/arch/sh/kernel/cpu/sh4a/clock-sh7757.c b/kernel/arch/sh/kernel/cpu/sh4a/clock-sh7757.c
new file mode 100644
index 000000000..9a28fdb36
--- /dev/null
+++ b/kernel/arch/sh/kernel/cpu/sh4a/clock-sh7757.c
@@ -0,0 +1,155 @@
+/*
+ * arch/sh/kernel/cpu/sh4/clock-sh7757.c
+ *
+ * SH7757 support for the clock framework
+ *
+ *  Copyright (C) 2009-2010  Renesas Solutions Corp.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/clkdev.h>
+#include <asm/clock.h>
+#include <asm/freq.h>
+
+/*
+ * Default rate for the root input clock, reset this with clk_set_rate()
+ * from the platform code.
+ */
+static struct clk extal_clk = {
+	.rate		= 48000000,
+};
+
+static unsigned long pll_recalc(struct clk *clk)
+{
+	int multiplier;
+
+	multiplier = test_mode_pin(MODE_PIN0) ? 24 : 16;
+
+	return clk->parent->rate * multiplier;
+}
+
+static struct sh_clk_ops pll_clk_ops = {
+	.recalc		= pll_recalc,
+};
+
+static struct clk pll_clk = {
+	.ops		= &pll_clk_ops,
+	.parent		= &extal_clk,
+	.flags		= CLK_ENABLE_ON_INIT,
+};
+
+static struct clk *clks[] = {
+	&extal_clk,
+	&pll_clk,
+};
+
+static unsigned int div2[] = { 1, 1, 2, 1, 1, 4, 1, 6,
+			       1, 1, 1, 16, 1, 24, 1, 1 };
+
+static struct clk_div_mult_table div4_div_mult_table = {
+	.divisors = div2,
+	.nr_divisors = ARRAY_SIZE(div2),
+};
+
+static struct clk_div4_table div4_table = {
+	.div_mult_table = &div4_div_mult_table,
+};
+
+enum { DIV4_I, DIV4_SH, DIV4_P, DIV4_NR };
+
+#define DIV4(_bit, _mask, _flags) \
+  SH_CLK_DIV4(&pll_clk, FRQCR, _bit, _mask, _flags)
+
+struct clk div4_clks[DIV4_NR] = {
+	/*
+	 * P clock is always enable, because some P clock modules is used
+	 * by Host PC.
+	 */
+	[DIV4_P] = DIV4(0, 0x2800, CLK_ENABLE_ON_INIT),
+	[DIV4_SH] = DIV4(12, 0x00a0, CLK_ENABLE_ON_INIT),
+	[DIV4_I] = DIV4(20, 0x0004, CLK_ENABLE_ON_INIT),
+};
+
+#define MSTPCR0		0xffc80030
+#define MSTPCR1		0xffc80034
+#define MSTPCR2		0xffc10028
+
+enum { MSTP004, MSTP000, MSTP127, MSTP114, MSTP113, MSTP112,
+       MSTP111, MSTP110, MSTP103, MSTP102, MSTP220,
+       MSTP_NR };
+
+static struct clk mstp_clks[MSTP_NR] = {
+	/* MSTPCR0 */
+	[MSTP004] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 4, 0),
+	[MSTP000] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 0, 0),
+
+	/* MSTPCR1 */
+	[MSTP127] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 27, 0),
+	[MSTP114] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 14, 0),
+	[MSTP113] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 13, 0),
+	[MSTP112] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 12, 0),
+	[MSTP111] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 11, 0),
+	[MSTP110] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 10, 0),
+	[MSTP103] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 3, 0),
+	[MSTP102] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 2, 0),
+
+	/* MSTPCR2 */
+	[MSTP220] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR2, 20, 0),
+};
+
+static struct clk_lookup lookups[] = {
+	/* main clocks */
+	CLKDEV_CON_ID("extal", &extal_clk),
+	CLKDEV_CON_ID("pll_clk", &pll_clk),
+
+	/* DIV4 clocks */
+	CLKDEV_CON_ID("peripheral_clk", &div4_clks[DIV4_P]),
+	CLKDEV_CON_ID("shyway_clk", &div4_clks[DIV4_SH]),
+	CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]),
+
+	/* MSTP32 clocks */
+	CLKDEV_DEV_ID("sh_mobile_sdhi.0", &mstp_clks[MSTP004]),
+	CLKDEV_CON_ID("riic0", &mstp_clks[MSTP000]),
+	CLKDEV_CON_ID("riic1", &mstp_clks[MSTP000]),
+	CLKDEV_CON_ID("riic2", &mstp_clks[MSTP000]),
+	CLKDEV_CON_ID("riic3", &mstp_clks[MSTP000]),
+	CLKDEV_CON_ID("riic4", &mstp_clks[MSTP000]),
+	CLKDEV_CON_ID("riic5", &mstp_clks[MSTP000]),
+	CLKDEV_CON_ID("riic6", &mstp_clks[MSTP000]),
+	CLKDEV_CON_ID("riic7", &mstp_clks[MSTP000]),
+
+	CLKDEV_ICK_ID("fck", "sh-tmu.0", &mstp_clks[MSTP113]),
+	CLKDEV_ICK_ID("fck", "sh-tmu.1", &mstp_clks[MSTP114]),
+	CLKDEV_ICK_ID("sci_fck", "sh-sci.2", &mstp_clks[MSTP112]),
+	CLKDEV_ICK_ID("sci_fck", "sh-sci.1", &mstp_clks[MSTP111]),
+	CLKDEV_ICK_ID("sci_fck", "sh-sci.0", &mstp_clks[MSTP110]),
+
+	CLKDEV_CON_ID("usb_fck", &mstp_clks[MSTP103]),
+	CLKDEV_DEV_ID("renesas_usbhs.0", &mstp_clks[MSTP102]),
+	CLKDEV_CON_ID("mmc0", &mstp_clks[MSTP220]),
+	CLKDEV_DEV_ID("rspi.2", &mstp_clks[MSTP127]),
+};
+
+int __init arch_clk_init(void)
+{
+	int i, ret = 0;
+
+	for (i = 0; i < ARRAY_SIZE(clks); i++)
+		ret |= clk_register(clks[i]);
+	for (i = 0; i < ARRAY_SIZE(lookups); i++)
+		clkdev_add(&lookups[i]);
+
+	if (!ret)
+		ret = sh_clk_div4_register(div4_clks, ARRAY_SIZE(div4_clks),
+					   &div4_table);
+	if (!ret)
+		ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);
+
+	return ret;
+}
+